Macro pyo3::pyobject_native_type

macro_rules! pyobject_native_type {
    ($name : ty, $layout : path, $typeobject : expr, $module : expr,
 $checkfunction : path $(; $generics : ident) *) => { ... };
    ($name : ty, $layout : path, $typeobject : expr, $checkfunction : path
 $(; $generics : ident) *) => { ... };
}